Figure 1.

The primary sequence of LFN (Bragg and Robertson, 1989) with its N-terminal Novagen His6-tag. The orange arrows mark the cysteine mutants investigated in this paper. Acidic residues (aspartates and glutamates) are colored in red, and basic residues (lysines, arginines, and histidines) are in blue. Above the sequence, the red sine waves designate α-helices, the yellow arrows are β-structure, the black lines mark neither α-helices nor β-structure, as determined from the crystal structure of LF (PDB entry 1JKY), and the gray line designates the unresolved unstructured region, residues 1–28.

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